JPH0568918B2 - - Google Patents

Description

[Detailed description of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording apparatus, and more particularly to a magnetic recording apparatus that records luminance signals and the like by simultaneously forming separate tracks in separate areas in the tape width direction using separate rotating heads. Conventional technology Currently, helical scan magnetic recording and reproducing devices (VTR) use 1/2 inch wide magnetic tape.
Since the band that can be recorded and reproduced for home use is relatively narrow, of the luminance signal and carrier color signal separated from the color video signal, the luminance signal is frequency-modulated to become a frequency-modulated wave, and the carrier color signal is converted into a frequency-modulated wave. After the converted carrier color signal is obtained, it is frequency-division multiplexed on the frequency-modulated luminance signal, and this frequency-division multiplexed signal is recorded on a magnetic tape and reproduced. It uses a so-called low-frequency conversion color recording and playback method, and also uses a guard bandless recording method in which the azimuth angles of each rotating head that record adjacent tracks are made to be different to improve tape utilization efficiency. . On the other hand, in the case of professional VTRs intended for broadcasting, especially camera-type VTRs, the tape width is the same as that of home VTRs, with the aim of making the device smaller and lighter and improving the quality of the reproduced color video signal. on magnetic tape,
A system is adopted in which the luminance signal and the color signal are recorded on separate tracks using separate rotating heads, and a guard band is provided between adjacent tracks for recording and reproduction. FIGS. 9 and 10 respectively show examples of track patterns recorded and formed by the above-mentioned conventional camera-body type VTR. In FIG. 9, tracks 2 ₁ , 2 ₂ , 2 are inclined with respect to the longitudinal direction of the magnetic tape 1.
₃ are tracks on which frequency-modulated luminance signals (hereinafter referred to as FM luminance signals) are recorded, while tracks 3 ₁ , 3 ₂ , and 3 ₃ are tracks in which different carrier waves are frequency-modulated with color difference signals I and Q, respectively. 1st and 2nd
This is a track in which frequency-modulated color difference signals (hereinafter referred to as FM color difference signals) are frequency-division multiplexed and recorded. Tracks 2 ₁ and 3 ₁ are tracks in which the FM luminance signal and FM difference signal of the same field are recorded simultaneously and separately, and similarly, tracks 2 ₂ and 3 ₂ and 2 ₃ and 3 ₃ are tracks in which the FM luminance signal and FM difference signal of the same field are recorded simultaneously. of
FM luminance signal and FM color difference signal simultaneously and
These are tracks recorded separately. Furthermore, the plurality of rotating heads that record and form tracks 2 ₁ to 2 ₃ and 3 ₁ to 3 ₃ all have the same azimuth angle, and a guard band (no signal recording zone) is formed between adjacent tracks. . In Fig. 9, 4 ₁ and 4 ₂ are audio tracks on which the audio signals of the first and second channels are recorded, 5 is a control track formed by the control head, and 6 is a time code formed by the time code head. This is a chord track. On _the other _hand , on the _magnetic tape _{7 shown} in _FIG .
A time code track 11 and a control track 12 are recorded respectively. Recording tracks ₈₁ and ₈₂ are tracks in which FM luminance signals are recorded by rotating heads with an azimuth angle of -15°, and recording tracks ₉₁ and ₉₂ are tracks in which FM time-base compressed color difference signals are recorded by rotating heads in an azimuth angle of +15°. This is a recorded track. Here, the above FM time axis compressed color difference signal is the color difference signal (R-Y) and (B-Y).
After compressing the time axis to 1/2, they are time-division multiplexed alternately every H/2 (where H is the horizontal scanning period), and the carrier wave is frequency-modulated using this time-division multiplexed signal. be. Two first rotating heads with an azimuth angle of -15° above and an azimuth angle of +15°
and the two second rotating heads of the track 8.
After recording tracks ₁ and 9 ₁ simultaneously and separately, tracks 8 ₂ and 9 ₂ are recorded simultaneously and separately in the next field, and then two tracks are recorded in the same manner. It is being formed. Furthermore, a guard band is formed between two adjacent tracks among tracks 8 ₁ , 8 ₂ , 9 ₁ , and 9 ₂ to avoid mutual crosstalk. In the color video signal recording and reproducing apparatus that forms either of the track patterns shown in FIGS. 9 and 10 above, the luminance signal and color difference signal are recorded on separate tracks and reproduced, so FM in conversion color recording/playback system VTRs
Moiré, which occurs when a luminance signal and a low frequency conversion carrier chrominance signal are simultaneously recorded and reproduced on the same track on a non-linear transmission magnetic tape, does not occur, and both the recording and reproduction bands of the luminance signal and chrominance signal can be recorded and reproduced separately. It can be wide enough and also reduces the conversion carrier color signal.
Since it is not a device that performs bias recording using FM luminance signals, the S/N (signal-to-noise ratio) of the reproduced color difference signal
As described above, it is possible to obtain a reproduced color video signal of higher image quality than that of a VTR using the low frequency conversion color recording and reproduction method. However, all of the conventional color video signal recording and reproducing apparatuses described above have a guard band, which makes the use of the magnetic tape inefficient, and also causes the rotary head to scan adjacent tracks beyond the guard band during playback. In this case, since the FM luminance signal and the FM color difference signal are recorded separately on two adjacent tracks, the rotary head for the brightness signal (or the rotary head for the color difference signal) is used to record the FM color difference signal (or the rotary head for the color difference signal).
FM brightness signal), and there is no field correlation between the reproduced signals of both tracks. A crosstalk canceling method using correlation cannot be used, and there is also the problem that the reproduced image has noticeable crosstalk. Furthermore, in the conventional color video signal recording and reproducing apparatus that forms the track pattern shown in FIG. Another problem was that it caused a time difference. Therefore, the present applicant first proposed patent applications (2) and (3) (title of invention: "Color video signal recording and reproducing device") filed on February 25, 1985. According to this proposed recording and reproducing apparatus, three types of signals constituting a color video signal are formed on separate tracks in areas separated from each other in the tape width direction, as shown in FIG. 5 or FIG. 10, which will be described later. and record it and play it back. According to the color video signal recording and reproducing apparatus proposed by the present applicant, since the plurality of tracks that are simultaneously and separately recorded are completely separated in the tape width direction, the reproduced signal of each track is Mutual interference between devices can be prevented, and all the problems of the conventional devices described above can be solved. Problems to be Solved by the Invention In the color video signal recording and reproducing apparatus proposed by the present applicant, in which track should three types of signals that make up a color video signal, for example, a luminance signal and two types of color difference signals, be recorded? The question is: That is, the time axis fluctuations (jitter) of the reproduction signals of the plurality of tracks formed separately in the tape width direction are not the same, and as shown in FIG. 11, generally the lower end of the magnetic tape 14 is Since the magnetic tape is guided by the guide 15 and runs stably, the playback signal from the track at the bottom end of the tape located above the tape guide 15 has a greater amount of time axis fluctuation than the playback signal from the track at the top end of the tape. It can be said that there are few Further, as shown in FIG. 11, the magnetic tape 14
The lower end of the tape is positioned on the tape guide 15 formed on the lower fixed drum 16,
Moreover, the upper rotating drum 17 and the lower fixed drum 1
6 is wound around the circumferential side of the upper rotating drum 1.
For example, two rotating heads 18 and 19 attached to the tape 7 in the direction of its rotational axis allow the two tracks separated in the width direction of the tape to be formed separately and simultaneously. In this case, magnetic tape 1
4, the thickness of the air layer (so-called air film) formed between the magnetic tape 14 and the upper rotary drum 17 increases near the position where the rotary heads 18 and 19 begin to slide (the so-called inlet of the rotary drum). , is known to become larger as it moves above the position of the tape guide 15, and is largest at the upper end of the magnetic tape 14. Therefore, the closer the track is to the upper end of the magnetic tape, the weaker the pressing force of the rotary head 18 to the magnetic tape 14 becomes, and the S/N of the recording/reproducing signal becomes lower.
tends to get worse. On the other hand, when comparing a luminance signal and two types of color difference signals, the brightness signal has the widest frequency band, and the two types of color difference signals with narrower frequency bands originally have higher frequency components (information with a smaller screen area) than the brightness signal. ) is not transmitted, and even if there is some temporal variation, it will have less impact on visual perception than the luminance signal. Further, since the luminance signal includes a periodic signal used in a servo system and a monitor, it is preferable that the luminance signal not be influenced by time axis fluctuations. SUMMARY OF THE INVENTION In view of the above points, it is an object of the present invention to provide a magnetic recording device that solves the above problems by recording a luminance signal on a track in an area closest to the tape guide. Means for Solving the Problems The magnetic recording device according to the present invention has n sets (however,
(n is an integer greater than or equal to 2) rotating heads are installed at approximately the same angular position on the rotating surface with the rotational axis of the rotating body as the center, and at different height positions in the direction of the rotational axis of the rotating body, and color video signals are produced. The luminance signal and the color signal constituting the magnetic tape are separated from each other in the width direction of the tape by n sets of rotating heads, and are arranged in separate areas on the magnetic tape on n tracks inclined with respect to the longitudinal direction of the tape. The magnetic recording apparatus records the luminance signal in an area on the magnetic tape closest to the tape guide. Effect According to the present invention, since the luminance signal is recorded in the area on the magnetic tape closest to the tape guide,
Compared to signals related to color signals, the luminance signal has the smallest time axis error due to positional fluctuations when the tape is running due to the tape guide, and the thickness of the air layer between the circumferential surface of the rotating body and the tape is the largest. By making it small, the contact between the tape and the head is stable and good reproduction can be achieved. Further, according to the present invention, the luminance signal and the color signal constituting the color video signal are transferred to n inclined tracks separated from each other in the tape width direction in separate areas on the magnetic tape by n sets of rotating heads. Although there is crosstalk between signals of the same type that can be removed by a crosstalk cancellation method that uses field correlation for recording, crosstalk between uncorrelated luminance signals and signals related to chrominance signals is prevented. can. Embodiments of the present invention will be described below with reference to FIGS. 1 to 8. Embodiment FIG. 1 shows a block system diagram of an embodiment of the apparatus of the present invention. In this example, the FM luminance signal is rotated to the Y
1 and Y2 and recorded on the track closest to the tape guide, and the signal processing itself is well known. In FIG. 1, red (R),
The green (G) and blue (B) primary color signals are respectively supplied to the encoder 24 and converted into a luminance signal and two types of color difference signals (for example, RY and BY). The luminance signal taken out from the encoder 24 is sent to an automatic gain control circuit (AGC circuit) 25, a low-pass filter 28,
The signal is supplied to a frequency modulator 37 through an emphasis circuit 31 and a white/dark clip circuit 34, respectively. On the other hand, 2 taken out from the encoder 24
The seed color difference signals (R-Y) and (B-Y) are passed through AGC circuits 26 and 27, reduction filters 29 and 30, emphasis circuits 32 and 33, and white/dark clip circuits 35 and 36 to adjust the frequency. The signal is supplied to modulators 38 and 39. From the frequency modulator 37, as shown in FIG. 2A,
An FM luminance signal with a carrier shift band of 5 MHz to 6 MHz and a lower sideband is extracted and passed through a high-pass filter 40, a recording amplifier 43, and rotary transformers 44 ₁ and 44 ₂ , respectively, to the first and second transformers. are supplied to rotary heads Y1 and Y2, respectively. on the other hand,
From the frequency modulators 38 and 39, the first and second FM
A color difference signal is extracted. FIG. 2B shows an example of the frequency spectrum of the first and second FM color difference signals. In Fig. 2B, is the frequency spectrum of the first FM color difference signal obtained by frequency modulating the first carrier wave with the color difference signal R-Y, and the carrier wave shift band c is selected from 5MHz to 6MHz. . on the other hand,
is the frequency spectrum of the second FM color difference signal obtained by frequency modulating the second carrier wave with the color difference signal B-Y, and its carrier wave shift band c is 0.8MHz to 1.2M
Hz. The first FM color difference signal taken out from the frequency modulator 38 and the second FM color difference signal taken out from the frequency modulator 39 are supplied to the mixing circuit 45 through band filters 41 and 42, respectively. Then, frequency division multiplexing is performed here. On the other hand, the audio signals of the first and second channels that have entered the input terminals 46 and 47 are processed by noise reduction circuits 48 and 49 that perform, for example, a level compression operation for noise reduction during playback, and a predetermined high frequency component. Emphasis circuit 5 that increases the level of
0 and 51 to frequency modulators 52 and 53. The frequency modulator 52 outputs a first channel FM audio signal having a frequency spectrum shown in FIG. 2B obtained by frequency modulating the first carrier wave with the first channel audio signal. Also,
From the frequency modulator 53, the second carrier wave is frequency-modulated using the audio signal of the second channel.
The FM audio signal of the second channel of the frequency spectrum shown in is extracted. Frequency modulator 5
The FM audio signals taken out from the filters 2 and 53 are supplied to a mixing circuit 56 through band filters 54 and 55, respectively, where they are frequency division multiplexed and then supplied to a mixing circuit 45. As a result, a frequency division multiplexed signal having _a frequency spectrum _shown in FIG.
2, respectively. Here, the rotating head Y1,
Y2, C1, and C2 are fixedly attached to an upper rotating drum 63, which is an example of a rotating body, as shown in FIGS. . In the figure A,
A motor shaft 61 of the motor 60 passes through the center of a lower fixed drum 62 and is fixed to the center of a cylindrical upper rotating drum 63, which is an example of a rotating body. Therefore, only the rotating drum 63 mentioned above is rotated by the motor 60. The lower fixed drum 62 is provided with a tape guide 64, and the lower end of the magnetic tape is guided along the tape guide 64, and the magnetic tape is attached to the circumferential surfaces of the lower fixed drum 62 and the upper rotary drum 63, and is approximately rotated.
It is made to run while being wound over an angular range of 180°. The top view of the upper rotating drum 63 is shown in FIG. 3B.
As shown in FIG. 2, first and second rotating heads Y1 and Y2 are arranged opposite to each other on the rotating surface of the upper rotating drum 63.
is attached, as well as third and fourth rotating heads C1 and C2. Further, as can be seen from FIG. 3A, the rotary heads Y1 and Y2 are attached to the upper rotary drum 63 at the same height position,
Similarly, rotating heads C1 and C2 are mounted at the same height. Furthermore, as can be seen from FIGS. 3A and 3B, the rotary heads Y1 and C1 are installed at different height positions in the direction of the rotation axis of the upper rotary drum 63, and are installed at approximately the same position on the rotation surface. There is. This also applies between rotary heads Y2 and C2. In addition, the rotating heads Y1, Y
2, C1 and C2 each have a predetermined azimuth angle gap, and the relationship between the head azimuth angle and the signal to be recorded is summarized as shown in the following table.

[Table] As a result, the first field is the track shown in Fig. 4 using the rotary heads Y1 and C1.
Tr ₁ and Tc ₁ are recorded simultaneously and separately on the magnetic tape 65, and the next field is recorded as track Tr 2 and Tc ₁ by rotary heads Y2 and C2.
Tc ₂ are recorded simultaneously and separately. Thereafter, in the same manner as above, the rotating heads Y1 and C1 and Y2 and C2 alternately move a pair of tracks Tr ₃ , Tc ₃ →Tr ₄ ,
Records are formed sequentially in the order of Tc ₄ →Tr ₅ , Tc ₅ →... without guard bands. In this way, of the two recording areas W ₁ and W ₂ , the tape guide 64
In the tracks Tr ₁ to _{Tr 10} formed in the recording area W ₁ on the lower end side of the tape near the FM luminance signal having the frequency spectrum shown in FIG. 2A is recorded.
Tracks Tc ₁ ~ formed in the other recording area W ₂
At Tc ₁₀ , a frequency division multiplexed signal consisting of the first and second FM color difference signals having the frequency spectrum shown in FIG. 2B and the FM audio signals of the first and second channels is recorded. Further, the horizontal synchronizing signal portions recorded on tracks Tr ₁ to _{Tr 10} are aligned in the track width direction, as shown with solid lines in FIG. 5, which is a partially enlarged view of the track pattern in FIG. 4. recorded (so-called H
(recorded in sequence). Also, in FIG. 4, tracks 66 ₁ , 66 recorded along the longitudinal direction of the magnetic tape 65
₂ , 67 and 68 are tracks formed by dedicated fixed heads, 66 ₁ and 66 ₂ are audio tracks on which the audio signals of the first and second channels are recorded, and 67 is a track for knowing the position information on the tape. 68 is a time code track on which a time code is recorded, and 68 is a control track on which a control pulse of a constant period is recorded. Next, an example of a reproducing apparatus for reproducing recorded signals of the magnetic tape 65 having track patterns as shown in FIGS. 4 and 5 recorded by the apparatus of the present invention will be explained with reference to FIG. 6. magnetic tape 65
The upper recording tracks Tr ₁ to Tr ₁₀ are alternately scanned field by field by rotary heads Y1 and Y2.
After the recorded FM luminance signal is reproduced, it is supplied to the FM demodulator 71 through rotary transformers 44 ₁ and 44 ₂ , a switch circuit (not shown) for making a continuous signal, and a reproduction preamplifier 70 . Meanwhile, at the same time, the recording tracks Tc ₁ to Tc ₁₀ on the magnetic tape 65 are rotated by the rotary heads C1 and C2.
Each field is alternately scanned and the recorded frequency division multiplexed signal is reproduced. This reproduced frequency division multiplexed signal is transmitted through rotary transformers 58 ₁ and 58
₂ , are supplied to band filters 73, 74, 75 and 76 through a switch circuit (not shown) for making continuous signals and a reproduction preamplifier 72, respectively, where the first and second FM color difference signals and the first and first FM color difference signals are 2
The FM audio signals of each channel are separated. The reproduced luminance signal obtained by FM demodulation by the FM demodulator 71 is supplied to a decoder 79 through a low-pass filter 77 and a de-emphasis circuit 78, respectively. On the other hand, the first reproduced FM color difference signal having the frequency spectrum shown in FIG.
It is FM demodulated and made into a reproduced color difference signal (R-Y),
Also, FIG. 2B taken out from the band filter 74
The second reproduction of the frequency spectrum shown in
The FM color difference signal is FM demodulated by an FM demodulator 81 to produce a reproduced color difference signal (B-Y). The reproduced color difference signals (R-Y) and (B-Y) are supplied to a decoder 79 through low-pass filters 82 and 83 and de-emphasis circuits 84 and 85, respectively. This causes the decoder 79 to output terminals 86, 87 and 8.
Three primary color signals of red (R), green (G), and blue (B) are output to 8. Furthermore, the reproduced FM audio signals of the first and second channels of the frequency spectrum shown in FIG. After the reproduced audio signal of the first channel and the reproduced audio signal of the second channel are made, the de-emphasis circuits 91 and 92 and the noise reduction circuit 9
3 and 94 to provide characteristics complementary to those during recording and reduce noise, and then output to output terminals 95 and 96. Next, another embodiment of the apparatus of the present invention will be described. In this embodiment, as shown in FIGS. 7A and 7B, six rotating heads H1 to H6 are connected to an upper rotating drum 100.
The present invention is applied to an apparatus for forming a track pattern as shown in FIG. Components in FIGS. 7A and 7B that are the same as those in FIGS. 3A and 3B are designated by the same reference numerals, and their explanations will be omitted. Figure 7 A, B
As can be seen, the rotating heads H1 and H2, H3 and H4, and H5 and H6 are installed at the same height on the rotating surface of the upper rotating drum 100, and the rotating heads H1, H3, and H5 are attached to the rotating surface of the upper rotating drum 100. The rotary heads H2, H4, and H6 are aligned in the direction of the rotation axis and installed at different heights, and similarly, the rotating heads H2, H4, and H6 are also aligned in the direction of the rotation axis and installed at different heights. In addition, the rotating heads H1, H2, H3, H4, H5, and H6 each have a predetermined azimuth angle gap, and the relationship between the head azimuth angle and the signal to be recorded is summarized as shown in the following table. .

[Table] With the rotating heads H1 to H6 having the above configuration, a track T11 is formed on the magnetic tape 101 shown in FIG. 8, tilted by an angle θ and without a guard band, in three areas Wa, Wb and Wc separated in the tape width direction _. ~ _T18 ,
_T21 to _T28 and _T31 to _T38 are formed, respectively. Here, tracks _T11 to _T18 are the first tracks and tracks recorded by the rotary heads H1 and H2.
_T21 to _T28 are the second tracks recorded by the rotary heads H3 and H4; tracks _T31 to _T38;
is the third track recorded by rotating heads H5 and H6. Furthermore, H horizontal synchronizing signals are recorded in the first track. Furthermore, for example, at the upper end of the 1/2 inch wide magnetic tape 101, there is an audio track 102 ₁ on which audio signals of the first and second channels are respectively recorded by fixed audio heads along the longitudinal direction of the tape.
and 102 ₂ are formed, and on the other hand, at the lower end there is a time code track 103 in which a time code for knowing the position information on the tape is recorded by a fixed time code head, and a time code track 103 in which a time code for knowing position information on the tape is recorded by a fixed control head, and Control tracks 104 on which control pulses are recorded are formed parallel to each other along the longitudinal direction of the tape. Note that the second track T ₂₁ to _{T 28} shown in FIG.
For example, the frequency division multiplexed signal of the first FM color difference signal and the FM audio signal of the first channel, the third
For example, frequency division multiplexed signals of the second FM color difference signal and the FM audio signal of the second channel are recorded in tracks _T31 to _T38 , respectively. As described above, according to this embodiment, the three tracks T ₁₁ to _{T 18} and T ₂₁ to _{T 28} are recorded in the recording areas Wa, Wb, and Wc separated in the tape width direction, respectively.
And among the tracks T ₃₁ to _{T 38} , the first track T ₁₁ to _{T 18} closest to the tape guide 64 side has a wider band than the first and second color difference signals and the audio signals of the first and second channels. A luminance signal is recorded. The recording system and reproduction system of the signals recorded on the recording tracks T ₁₁ to _{T 18} , T ₂₁ to _{T 28} , and T ₃₁ to _{T 38} of the track pattern shown in FIG. 8 are as shown in FIGS. 1 and 6. Since it can be easily inferred, its explanation will be omitted. It should be noted that the present invention is not limited to the above embodiments, but also includes various other modifications. For example, I and Q signals may be used as the first and second color difference signals, and two types of color difference signals processed by time division multiplexing instead of frequency division multiplexing may be recorded and reproduced. Further, the signals recorded and reproduced by the rotary heads C1 and C2 may be any color signal, for example, a multiplexed signal of a low frequency conversion carrier color signal and a bias signal, or a signal obtained by frequency modulating a carrier wave with a low frequency conversion carrier color signal. It may also be an FM low-pass conversion carrier color signal, an FM line sequential color difference signal, or a multiplexed signal of three types of FM signals obtained by frequency modulating the three primary color signals separately. Further, the signals recorded and reproduced by the rotary heads H1 to H6 may be three types of signals constituting a color video signal, and therefore may be three types of FM primary color signals obtained by separately frequency modulating the three primary color signals. Furthermore, rotating heads C1, C2, Y1, Y
The rotating body to which H2 or H1 to H6 are attached may have a configuration in which flat square rod-shaped head bars are arranged in two or three upper and lower stages. Furthermore, the rotating heads C1, C2, Y1, Y2, H1 to H6 may have the same azimuth angle to form a track pattern with a guard band.
Between 1 and C1, between Y2 and C2, H1, H3
and H5, and the azimuth angles between H2, H4, and H6 do not have to be selected to be the same. Effects of the Invention As described above, according to the present invention, compared to signals related to color signals, the luminance signal has the smallest time axis error due to positional fluctuations during tape running due to the tape guide.
Moreover, since the thickness of the air layer between the circumferential surface of the rotating body and the tape is the smallest, the contact between the tape and the head is stable and good playback can be achieved.
By reproducing a luminance signal such as a periodic signal with minimal time axis variation, stable and high-quality images can be reproduced. Further, according to the present invention, it is possible to prevent crosstalk between the luminance signal and the signal related to the chrominance signal, which have no correlation, so that mutual interference between the luminance signal and the chrominance signal can be eliminated in principle. , which has the feature of being able to improve the playback quality of color video signals.

[Brief explanation of the drawing]

FIG. 1 is a block system diagram showing one embodiment of the device of the present invention, FIG. 2 is a diagram showing frequency spectra of signals of each main part in the block system shown in FIG. 1, and FIG.
The figures are a front view and a plan view showing the arrangement of rotating heads applicable to an embodiment of the apparatus of the present invention, and FIG. 4 is a diagram showing a first embodiment of a track pattern recorded and formed by the apparatus of the invention. 5 is a partially enlarged view of the track pattern shown in FIG. 4, FIG. 6 is a block system diagram showing an example of a reproducing device for reproducing a recorded signal on a magnetic tape recorded by the apparatus of the present invention, and FIG. Front view and plan view showing the arrangement relationship of the rotating head applicable to other embodiments of the inventive device, No. 8
Figures 9 and 10 are diagrams showing a second embodiment of track patterns recorded and formed by the apparatus of the present invention.
The figures show examples of track patterns recorded and formed by conventional devices, and FIG. 11 shows the sliding situation between the rotary head and the magnetic tape in a color video signal recording and reproducing device previously proposed by the applicant. FIG. 1, 7, 14, 65, 101...magnetic tape,
15, 64... Tape guide, 16, 62... Lower fixed drum, 17, 63, 100... Upper rotating drum, 18, 19... Rotating head, 21-23
...Three primary color signal input terminals, 24...Encoder,
37-39, 52, 53...frequency modulator, 4
5, 56... Mixing circuit, 46, 47... Audio signal input terminal, 60... Motor, 71, 80, 81,
89, 90...FM demodulator, 73-76...Band filter, 86-88...Reproduction three primary color signal output terminal, 95,96...Reproduction audio signal output terminal, Y
1, Y2, C1, C2, H1 to H6...Rotating head.

Claims (1)

[Claims] 1. A running magnetic tape is guided by a tape guide that guides one end of the tape in the longitudinal direction, and is rotated approximately 180 degrees.
One set consists of two sets of rotating heads installed at the same height at opposite positions on the rotating surface of a rotating body that is wound over an angular range of . ) are respectively installed at substantially the same angular position on the rotating surface with the rotational axis of the rotating body as the center, and at different height positions in the direction of the rotational axis of the rotating body, and the brightness constituting the color video signal is The signal and the signal related to the color signal are separated from each other in the tape width direction by the n sets of rotating heads, and are placed in separate areas on the magnetic tape on n tracks inclined with respect to the longitudinal direction of the tape, and , a magnetic recording device for simultaneous recording, characterized in that the luminance signal is recorded in an area on the magnetic tape closest to a tape guide.